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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-06-09 20:05:00 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-06-09 20:05:00 +0000 |
| commit | 8bc5eca3314f401cdb8bc1dcbe28554a5831c280 (patch) | |
| tree | ec413738a55a2072e7af0eacd80fd315f2bc4c35 /llvm/lib/CodeGen | |
| parent | eee5f1fdacb9492ed825c81939ddf79c3f21771e (diff) | |
| download | bcm5719-llvm-8bc5eca3314f401cdb8bc1dcbe28554a5831c280.tar.gz bcm5719-llvm-8bc5eca3314f401cdb8bc1dcbe28554a5831c280.zip | |
Mark physregs defined by inline asm as implicit.
This is a bit of a hack to make inline asm look more like call instructions.
It would be better to produce correct dead flags during isel.
llvm-svn: 105749
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp b/llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp index 1febdb511ca..1c53dbd1b2b 100644 --- a/llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp @@ -821,14 +821,18 @@ EmitSpecialNode(SDNode *Node, bool IsClone, bool IsCloned, case InlineAsm::Kind_RegDef: for (; NumVals; --NumVals, ++i) { unsigned Reg = cast<RegisterSDNode>(Node->getOperand(i))->getReg(); - MI->addOperand(MachineOperand::CreateReg(Reg, true)); + // FIXME: Add dead flags for physical and virtual registers defined. + // For now, mark physical register defs as implicit to help fast + // regalloc. This makes inline asm look a lot like calls. + MI->addOperand(MachineOperand::CreateReg(Reg, true, + /*isImp=*/ TargetRegisterInfo::isPhysicalRegister(Reg))); } break; case InlineAsm::Kind_RegDefEarlyClobber: for (; NumVals; --NumVals, ++i) { unsigned Reg = cast<RegisterSDNode>(Node->getOperand(i))->getReg(); MI->addOperand(MachineOperand::CreateReg(Reg, /*isDef=*/ true, - /*isImp=*/ false, + /*isImp=*/ TargetRegisterInfo::isPhysicalRegister(Reg), /*isKill=*/ false, /*isDead=*/ false, /*isUndef=*/false, |
